Spring-hinge



(Model.)

G. M. JEWETT.

2'Sheets-Sheet 1.

SEEING HINGE.

Patented Jan. 17.1882.

, mmm

(Model.) I 2 Sheets-Sheet 2 4 G. M. JEWETT.

SPRING HINGE.

No. 252,470. l Patented Jan. 17,1882.

same.

UNITED STATES PATENT 'OFFICE GEORGE M. JEWETT, or UnionviLLE,oonNEcTi'cUr.

SPRING-mince.

SPECIFICATION forming part of Letters Patent No; 252,470, dated January17, 1882,

Applicationfiled May 31, 1881. (Model.)

To all whom it may concern:

Be it known thatl, GEORGE lVLJEwE'rT, ot'

.Unionvil1e,in the county of Hartford and State of Connecticut, haveinvented a new and useful Improvement in Spring-Hinges, of whichv thefollowing is a specification and description.

The object of myinvention is to provide a cheap and effectivespring-hinge, which may be made so as to cause the door to swing eitherway when attached thereto, the use of the hinge being to cause a door toshut of itself when left open 5l and I accomplish this by the meanssubstantially as hereinafter described, and illustrated in theaccompanying drawings, in which- A Figure I is a front view of a doublesprin ghinge made according to my invention with one of its leaves open.lFig. II is a side View of the same. Fig. III is a top view of the.

Fig. IV is a side view of the knucklebar and the cam connected therewithand with the actuating-spring. Fig. V is a top view of the same, with apart broken away to show the recess in the cam which receives the end ofthe knuckle-har. Fig. VI is a front view of a portion of one of theleaves of a double hinge.

i Fig. VII is a top view of the sanne..` Fig. VIII l,is a front view ofone modification of a single hingeinade according to my invention. 1XisV an edge view of the same. top view of the same, showing itsapplication to a door. Fig. XI is a side view of one modification of thecam which receives the end of the knuckle-bar, constructed for use withthe modification of hinge shown in Figs. VIII and 1X; and Fig. XII is atop view of said cam.

1n the drawings having reference to a single hinge, as shown in Figs.VIII and IX, l denotes one leaf of the hinge provided with aprojection,.as 2, at each end, which is drilled to receive a pivot, 4,and l5 denotes `the other lea-f of the hinge, which is provided with asimilar, although somewhat longer, projection, as 3, at each end, alsodrilled to receive the Eigsame pivot 4, by which means these two leaves'are hinged or pivoted together. A trunnion, as 12, is made on the upperface o t' the lower projection, 3, and also on the lower face oftheupper one, at a point just outside the pivot 4, and about Ona line withtheleaf l of the hinge,

Fig. Xisa or if the trunnions are not useda holcis made at that pointin' said projections 3 as shown at 16 in Fig. X, and a wire or spindleis secured therein extending from one projection 3 to the other, andrmly secured in both.

Extending out from the outer face of the leaf 1, and atits inner edge,is a post, as 7, and hung on the spindle or wireand preferably on eachside, a brace, as 9, extending out from the inner edge ofthe leaf 151Midway the length of said spindle or wire is a cam, as 6, which, in theconstruction of the single hinge shown in Figs. VIII,IX, and X, I haveshown as made double, and in a single piece to straddle the brace 9;

vand in the end of this cam 6 is a cavity, as I4,

(shown in dotted lines,) to receivethe end of the knuckle-bar S. Thisbar I prefer tomake in `two parts, one smaller than the other, andhaving ascrew-thread on its exterior to turn into the threaded bore ofthe other and larger part,

x and one end ofthe bar 8 is inserted in a cavity,

as 1,8,f in the post 7, and the other end of the bar is inserted in acavity, as 11i. This cam 6 may be made single, as shown in Fig. IV, or

double, as shown in Fig. XI, and when made single it is provided with aboss or bridge, as 12, cast on one side, as shown in Fig. IV, and

also ashort stud, as 5, cast'on the same side,

' spindle extends through the spring this may be found quite sufficientto give a good firm bearing for the spring to keep it in place.

In a single spring, or in one having only two leaves, each with a singlepost, 7, [use two coiled springs to each leaf, as shown in Figs. VIIIand IX', in whichcase one is coiled in one direction, or is a right handspring, and the other is coiled in the other direction, or is left hand.

In inserting the springs in place the ends of each spring are placedagainst the studs 5 with the bridges 12 inserted in the ends of thecoil, at top and bottom, the cani being iirst put in place, as shownclearly in Figs. VIII and IX, and the wire or spindle is insertedthrough the holes made in the projections 3 to receive it,

and passed inside the springs 10, through the The purpose of brace 9 andcam 6, pivoting the cam to the brace, and securing the spring rmly inplace between the projections 3, the holes in the latter receiving andsecuring the ends of the wire or spindle. The free end of the cam 6 isthen moved away from the post 7 and the end of the knuckle-bar 8inserted in the cavity 14 of the cam, and the other end of the barinserted in the cavity 18 in the`post 7. The boss or stud 5 may be madecircular in forni, if desired, and made of the full size of the end ofthe cani, as shown clearly in FigsIV and V.

It will be perceived that the bar 8 is not pivoted to any other part ofthe hinges, but when desired it may be easily removed from its socketsin the post and cam by holding the latter back against the spring, andthe bar may also be lengthened or shortened by turning one part eitherout or into the other part more or less, to give quicker andstrongeraction to the hinge in moving` the door. 4 v

In making large or double hinges it maybe found desirable to have twoposts, as 7, one at the upper end and one at the lower end of each leaf,with a knucklebar, 8, and cam 6in connection with the post, as shownclearly in Figs. I- and Il,in which case the cams, as (i, may be madesingle, as shown. clearly in Fig. IV, and in this construction the brace9 is provided with shoulders, as 5, which answer the same purpose as thestuds 5 on the cam G-namely, as a bearing for the end of the wire spring10.

It will be seen that I am enabled by my construction to use two springsto each leaf' of a hinge, and if at any time it should seem desirablethat the hinge should not act upon the door with so much force to closeit, v the end of one of the springs of one leaf may be disengaged fromthe stud 5, so that that spring will be inoperative as to any forceexerted against the door, so that if the latter with hoth springs ot' aleaf in operation had been' closed too quickly by such disengagement ofone of the springs it will be closed more easily and slowly.

It will thus be seen that bymaking the knuckle-bar 8 in two parts so asto make said bar variable in its length, and by making the hinge withtwo springs to each leaf, a great variety of adjustments as to thestrength of each hinge in its action upon the door may be successfullymade, and the hinge thus adapted to be used in various positions whereother hinges of this class, but not made with this adjustable feature,could not be successfully used.

When the hingeis made-double, as shown in Figs. I, 1I, and III, to beused in connection with a. door which swings in both directions, the twoouter leaves, 1, are to be secured, one to the door and the other to thedoor-frame, with the middle leaf, l5, operating as an idler between whenthe door is swung in one direction, and swinging with the door in theother direction.

It is evidentthat the brace 9 is not a necessary feature in theinvention, inasmuch as its the same, nor any part thereof, irrespectiveof 7 5 a hinge made according to my construction as hereinbeforedescribed.

In'the spring-hinges heretofore made the toggle portion of the hingeinto which the springis harnessed is pivoted together, so that thepivoted parts cannot be disconnected, and in the use of hinges the doorsto which they are secured, when swung about half-way open, will be heldopen by the reverse act-ion of the hinge. This is an undesirablefeature, inasmuch as a person enteringisliable to open the door so wideas that it will be held open by the action of the hinge when he intendsthat it shall close, and supposes as he enters that it will close ofitself. This objection is owing to the fact that the reverse action ofthe hinge takes effect too quickly in the natural swing of the door.

Myinvention entirely obviates this objec tion, as the reverse action ofthe hinge does not take effect unless the door is swung wide open, andfor the purpose of being held open, and it is not therefore liable t0 beleft open accidentally.

Having thus described my invention, what I claim as new is- 1. Thecombination, in a spring-hinge, of two leaves, one provided with a postprojecting therefrom, and both leaves provided ateach end with ahinge-projection, which two projections are pivoted together,an-actuating- 'spring located between`and secured to the IOO upper andlower projection of one of said a projection, which two projections arepivoted together, a spring located between the upper and lowerprojections 011 said leaves, a cam connected with and secured to saidspring, with a knuckle-bar having a loose socket-connection with saidcam, and made in two parts, and adjustable as to its length,andconnected with said post at the other end, substantially as described.

, GEORGE M. JEWETT. Witnesses: s

M. A. HILL, G. W. FRIsBIE,

IIO

IIS

